Composition of matter.



ROBERT M. COBBAN, OF MISSOULA, MONTANA.

COMPOSITION OF MATTER.

1,034,979. No Drawing.

Specification of Letters latent. Application filed March 18, 1911.Serial No. 614,868.

Patented Aug. 6, 1912.

To all whom it may concern:

Be it known that I, ROBERT M. COBBAN, a citizen of the United States,residing at Missoula, in the county of Missoula and State of Montana,have invented a new and useful composition of matter to be used as aflux in welding iron and steel and in the treatment of oxid of iron, asiron and steel f burnt in forging and welding, whereby the oxid of ironis reconverted to a metallic state.

'My improved composition consists of the following ingredients, combinedin substantially the following proportions, by weight :Silica (Si(),),75 per cent; alumina (A1 0,), 15 per cent; oxid of lime (63:10), 2 percent; ot'assium oxid (K 0), and sodium oxid 11,0), 8 per cent. To

prepare the same for use, the ingredients are reduced to finely granularan'd preferably to powdered form and thoroughly mixed.

In welding, my improved composition is used in the same manner as boraxand other well known fluxes, being applied to the parts to be weldedwhile at a. welding heat, the parts being then subjected to pressure,-

either by hammering or by passing them through pressure rolls, as. of arolling mill.

. For use in convertingoxid of iron into metallic iron, that is. torestore burnt iron or steel, the burnt iron or steel is subjected totheaction of the described composition, usually in 'a dry state, preferablyby embedding the burnt portion thereof, while at a temperatureapproximating a welding heat, in a quantity of said mixture andpermitting it to remain therein until the reaction extends through theentire iece or bar. will ,vary with the size 0 the bar or piece treated,but with small work will uire only a short time, usually from one-hal aminute to two minutes.

I have found that burnt ironor steel restored by the use of my improvedcomposition is somewhat more open than before being burnt, but that itsoriginal texture can be restored by pressure, either by hammering or bythe action ofpressure rolls.

While -I have attained the best results with the use of a compositionconsisting of the ingredients specified in substantially the proportionsgiven, I have found that these proportions admit of a considerable rangeof variation without materially affecting the results, and I do not,therefore, desire to limit myself to the exact proportions given. Also,as potassium oxid and sodium oxld are equivalents of each other, therelative proportions of these ingredients may be varied as desired, sothat, together they constitute the specified percentage of the entirecompound.

I claim I 1. The herein described composition of matter for treatingiron and iron oxid consistingof silica (siO alumina (A1 0 oxid of lime(CaO), and potassium oxid (K 0) and sodium oxid (Na O), substantially asdescribed;

2. The herein described composition of matter for treating iron and ironoxid consisti of silica (SiO 75 per cent, alumina (A1 15 per cent, oxidof lime (C210) 2 per cent, and potassium oxid (K 0) and sodium oxid (NaO) 8 per cent, s..bstan tially as described.

In testimony, that I claim the foregoing as my invention, I aflix myslgnature 1 n presence of two subscribing witnesses, this 9th day ofMarch, A. D. 1911.

ROBERT M. COBBAN.

Witneses;

B. C. Fno c,

FRED A. Mo RAID.

